# frozen_string_literal: true

describe Grape::Util::StackableValues do
  subject { described_class.new(parent) }

  let(:parent) { described_class.new }

  describe '#keys' do
    it 'returns all keys' do
      subject[:some_thing] = :foo_bar
      subject[:some_thing_else] = :foo_bar
      expect(subject.keys).to eq %i[some_thing some_thing_else].sort
    end

    it 'returns merged keys with parent' do
      parent[:some_thing] = :foo
      parent[:some_thing_else] = :foo

      subject[:some_thing] = :foo_bar
      subject[:some_thing_more] = :foo_bar

      expect(subject.keys).to eq %i[some_thing some_thing_else some_thing_more].sort
    end
  end

  describe '#delete' do
    it 'deletes a key' do
      subject[:some_thing] = :new_foo_bar
      subject.delete :some_thing
      expect(subject[:some_thing]).to eq []
    end

    it 'does not delete parent values' do
      parent[:some_thing] = :foo
      subject[:some_thing] = :new_foo_bar
      subject.delete :some_thing
      expect(subject[:some_thing]).to eq [:foo]
    end
  end

  describe '#[]' do
    it 'returns an array of values' do
      subject[:some_thing] = :foo
      expect(subject[:some_thing]).to eq [:foo]
    end

    it 'returns parent value when no value is set' do
      parent[:some_thing] = :foo
      expect(subject[:some_thing]).to eq [:foo]
    end

    it 'combines parent and actual values' do
      parent[:some_thing] = :foo
      subject[:some_thing] = :foo_bar
      expect(subject[:some_thing]).to eq %i[foo foo_bar]
    end

    it 'parent values are not changed' do
      parent[:some_thing] = :foo
      subject[:some_thing] = :foo_bar
      expect(parent[:some_thing]).to eq [:foo]
    end
  end

  describe '#[]=' do
    it 'sets a value' do
      subject[:some_thing] = :foo
      expect(subject[:some_thing]).to eq [:foo]
    end

    it 'pushes further values' do
      subject[:some_thing] = :foo
      subject[:some_thing] = :bar
      expect(subject[:some_thing]).to eq %i[foo bar]
    end

    it 'can handle array values' do
      subject[:some_thing] = :foo
      subject[:some_thing] = %i[bar more]
      expect(subject[:some_thing]).to eq [:foo, %i[bar more]]

      parent[:some_thing_else] = %i[foo bar]
      subject[:some_thing_else] = %i[some bar foo]

      expect(subject[:some_thing_else]).to eq [%i[foo bar], %i[some bar foo]]
    end
  end

  describe '#to_hash' do
    it 'returns a Hash representation' do
      parent[:some_thing] = :foo
      subject[:some_thing] = %i[bar more]
      subject[:some_thing_more] = :foo_bar
      expect(subject.to_hash).to eq(some_thing: [:foo, %i[bar more]], some_thing_more: [:foo_bar])
    end
  end

  describe '#clone' do
    let(:obj_cloned) { subject.clone }

    it 'copies all values' do
      parent = described_class.new
      child = described_class.new parent
      grandchild = described_class.new child

      parent[:some_thing] = :foo
      child[:some_thing] = %i[bar more]
      grandchild[:some_thing] = :grand_foo_bar
      grandchild[:some_thing_more] = :foo_bar

      expect(grandchild.clone.to_hash).to eq(some_thing: [:foo, %i[bar more], :grand_foo_bar], some_thing_more: [:foo_bar])
    end

    context 'complex (i.e. not primitive) data types (ex. middleware, please see bug #930)' do
      let(:middleware) { double }

      before { subject[:middleware] = middleware }

      it 'copies values; does not duplicate them' do
        expect(obj_cloned[:middleware]).to eq [middleware]
      end
    end
  end
end
